Q. A standing wave having 3 nodes and 2 antinodes is formed between two atoms having a distance 1.21 Å between them. The wavelength of the standing wave is
A) 1.21Å
B) 1.42Å
C) 6.05Å
D) 3.63Å
Explanation
(d) The given standing wave is shown in the figure
[image:15_image72.emf]
As length of loop or segment is
$\frac{\lambda}{2}$
So length of 2 segments is
$2\left( \frac{\lambda}{2} \right)$
$\therefore 2\frac{\lambda}{2} = 1.21Å$
$\Longrightarrow \lambda = 1.21Å$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.